7.4.6
Door Safety Switch
If fitted with the product switched off and cold visually check securely fixed and has not
been by-passed.
With the product switched on but cold open door and check fans and heating elements
do not operate.
7.4.7
Fan Operation
Switch on from cold and open door and visually check all fans are running or have run.
7.4.8
Shelves, Lights and Windows
If fitted with the product switched off visually check for serviceability and repair or
replace as necessary.
7.4.9
Lifting Points
If fitted with the product switched off and cold inspect for serviceability and repair or
replace as necessary. Seek specialist advice if needed on lifting points.
7.4.10
Stand and Castors
If fitted with the product switched off and cold inspect for serviceability and repair or
replace as necessary.
7.4.11
Air Flow Safety Switch
If fitted with the product switched off and cold block the exhaust outlet and check
heating elements do not operate. A “fan-fail” or similar alarm may indicate this if fitted.
If a replacement switch has to be fitted always set the pressure adjuster to the correct
value and seal the adjuster with red paint or similar.
7.4.12
Explosion Relief Panels
If fitted with the product switched off and cold visually check panels have not been
disturbed by over-pressure and that the clearance area needed around them has not
been obstructed.
7.4.13
Main temperature Controller and Over temperature Controller
Check the settings have not been adjusted and that the over-temperature controller if
fitted is set to typically 15°C above the set-point of the main controller.
7.4.14
Thermocouples
With the product switched off and cold visually check that the thermocouples tips have
not suffered mechanical damage while loading the chamber.
This may not be necessary if the thermocouples are located behind air guides or similar
where they cannot normally be damaged. Replace if necessary.
7.4.15
Instrument ON/Off Switch
Check the product only starts to operate when the Instrument switch is set to ON and
stops when switched to OFF.
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